Studies on Behaviour of in Service Tubular Material Used at Refinery Process Furnaces

Ibrahim Naim Ramadan,Eugen Victor Laudacescu,Loredana Irena Negoita,Maria Popa

doi:10.37358/rc.19.4.7085

Abstract

The purpose of the heat transfer analysis at the level of the technological furnace in radiation section was to determine the medium temperature on the outside wall of the pipeline through which the effluent is processed. It is important to keep an outside temperature of the wall of the duct below the maximum allowable temperature at which this carburizing process takes place. Thus, the temperature calculated on the outside pipe wall is 523.5 oC and the maximum allowable temperature of the outside pipe wall is 595.5oC. The carburizing process leads to the modification of the thermal conductivity of the tubing material. Therefore, if steel is enriched with carbon, thermal conductivity decreases.

Highlights

The purpose of the heat transfer analysis at the level of the technological furnace in radiation section was to determine the medium temperature on the outside wall of the pipeline through which the effluent is processed
Assessment of technical condition of coils by mechanical and technological tests carried out with periodic revisions involves specific procedures in order to be able to determine any changes resulting from exploitation, for different periods of time; The paper only refers to tubular material components without defects, but in many cases, they may have indentations due to manipulation or accidental mechanical contacts
It is important to keep an outside temperature of the wall of the duct below the maximum allowable temperature at which this carburizing process takes place

Summary

Introduction

The purpose of the heat transfer analysis at the level of the technological furnace in radiation section was to determine the medium temperature on the outside wall of the pipeline through which the effluent is processed. Carburization and oxidation phenomena, specific to tubular coils, due to circulated technological fluids through coils and the atmosphere inside the furnace, have secondary role in degradation of pipes, as there is thermal controlling possibility, materials with good characteristics regarding creep and fatigue resistance selection and the use of inhibitors [1, 2]. In the technological processes inside furnaces, due to high temperatures and technological fluids circulated through coils, the carbon clogs on the internal surface, forming coke, which must be constantly removed, because it may not produce changes of the mechanical properties.

Results

Conclusion